不同扫描速率下的循环伏安的图求扩散系数？ 被测物质的浓度确切的应该是指锂离子在物质中的浓度，举个例子，如磷酸钒锂：the electric charge carriers, the li+ ions, are located in the cavities within the framework. three four-fold crystallographic positions exist for the lithium atoms, resulting in 12 lithium positions within the unit cell. initially, 12 li+ ions are present in each unit cell in the lattice[11]. assuming that the concentratin of li+ is uniform in either the particles or the electrolyte, when the test cell was charged to 4.0v, about 4.0 li+ ions would be present in each unit cell (cell volume=0.89076 nm3) within the lattice. this calculation was based on the formula for specific capacity( c=4x/（6.02×10-23v）). accordingly, the value of co is about 7.38 ×10-3 mol cm-3， 查看更多
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